Last weekend a team of dedicated volunteers, with FLOW Project Leader Jane at the helm, took on the challenge of distributing 40 coir rolls to 8 sites across the Manhood Peninsula. They were ably assisted by Campbell Thorp, who drove the rolls around in his pick-up truck, and all went home happy in the knowledge of a task well done…and lots of loose coir fibres in their ears, mouths and clothing! A huge thanks is extended to all the volunteers that helped shift these rolls about, and a special thanks to Campbell Thorp for his work with his pick-up and trailer. The use of coir rolls is an important part of the habitat creation and improvement work that MWHG do, and we asked Jane to tell us more about the rolls and how they work.
In a nutshell, what is a coir roll?
A coir roll is a long sausage shaped bundle made of coconut fibres, which are bound together with bio-degradable cord. It’s an environmentally sound use of coconut fibres which are otherwise a waste product of coconut production. The coir rolls in this case have been delivered to us dry and they have 18-20 holes cut into them where plug plants can be placed. The benefit of dry coir rolls is that they are only 20-30 kg to heft about, compared to the 80 – 100 kg when wet. It also means that we can populate them up with the plants of our choosing as they are not pre-planted, so we can introduce very specific species relevant to the local area.
These coir rolls will be staked into place and then planted up with a range of riparian species to improve biodiversity and to stabilise the ditch banks. Once staked, the coir rolls absorb water and are a great medium for the plants to grow in. The plants soon put on growth and create large roots that go through the coir and into the banks of the ponds, ditches or banks where they have been placed. They do not need any topping up and will thrive, as demonstrated in the photos of Birdham Pond below. They then just require light cutting back once a year like any other vegetation. The coir will eventually disappear completely leaving the plants growing in the underlying soil.
After coir rolls are installed, the growth in one year can be incredible.
Why is the use of coir rolls important to MWHG’s work?
By helping to stabilise ditch and stream banks and introducing more plant biodiversity into the wetlands, we are trying to create better water vole habitat. Water Voles are England’s fastest declining mammal, so this work with help ensure that that they continue to have a stronghold on the Manhood Peninsula.
How do you decide where to put the coir rolls?
We target wetland sites that have very little floristic diversity, and which have been heavily shaded and under managed over a long period in the past. We have worked on these sites over the last couple of years removing willow and bramble that didn’t allow light to hit the water, opening them up and digging them out. The final stage is introducing native wetland species with the help of coir rolls that we can plant with plugs. This year, we have decided to target Hilton Business Park pond, the Cakeham Manor wetland area, Hale Farm, Regency house and Sparrow cottage – all sites we have worked on and prepared this winter. We may dig out these sites further, so will ensure that the coir rolls are not damaged.
The weather is a challenge this time of year, why put them out now?
We install the coir rolls this time of year because the vegetation/tree cutting season has finished with the start of the bird breeding season and it is also the beginning of the growing season. Small plug plants put into the rolls have a whole growing season ahead and can quickly green-up what had previously been a dark and bare site. The rolls have all gone onto site now and we will spend the next couple of weeks installing them. This Friday we will start work on Hilton Business Park – staking the rolls into place and planting them with a range of plug plant species.
After installation, the coir rolls green-up quickly, adding an early flush of life to bare winter wetlands and helping to stabilise the banks.
Is that it, or will you be installing more rolls in the future?
I will probably try and get more of these rolls next year so that we can do this all again on the new sites we will be working on. This work is so satisfying because we can see the results quickly and it makes a big difference to the quality and diversity of our local wetlands. We are always looking for new volunteers to come and help us, so if this blog has inspired you, why not get in touch and find out how you can get involved. There is no requirement for a regular commitment, and coming along for a taster session is great way to meet the volunteers and see if it is something you might enjoy.
Please contact Rebecca on firstname.lastname@example.org for more information about volunteering with MWHG, or ring Jane on 07743824049 if you wish to join a work event. Details of our upcoming tasks can be found on our website calendar.
Post by Rebecca